A group of 2,000 adults who reported low-intake of red meat and 3,500 adults who reported high intake of red meat were followed over time. After 5 years of follow up, 20 of those with low intake of red meat and 50 with high intake of red meat developed colon cancer. Calculate the relative risk of colon cancer among those with high red meat intake compared to those with low red meat intake.

Enter the result with two numbers after period